1 //===- SystemUtils.cpp - Utilities for low-level system tasks -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains functions used to do a variety of low-level, often
11 // system-specific, tasks.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Support/Streams.h"
16 #include "llvm/Support/SystemUtils.h"
17 #include "llvm/System/Process.h"
18 #include "llvm/System/Program.h"
22 bool llvm::CheckBitcodeOutputToConsole(raw_ostream* stream_to_check,
24 if (stream_to_check == &outs() &&
25 sys::Process::StandardOutIsDisplayed()) {
27 cerr << "WARNING: You're attempting to print out a bitcode file.\n"
28 << "This is inadvisable as it may cause display problems. If\n"
29 << "you REALLY want to taste LLVM bitcode first-hand, you\n"
30 << "can force output with the `-f' option.\n\n";
37 bool llvm::CheckBitcodeOutputToConsole(std::ostream* stream_to_check,
39 if (stream_to_check == cout.stream() &&
40 sys::Process::StandardOutIsDisplayed()) {
42 cerr << "WARNING: You're attempting to print out a bitcode file.\n"
43 << "This is inadvisable as it may cause display problems. If\n"
44 << "you REALLY want to taste LLVM bitcode first-hand, you\n"
45 << "can force output with the `-f' option.\n\n";
52 /// FindExecutable - Find a named executable, giving the argv[0] of program
53 /// being executed. This allows us to find another LLVM tool if it is built
54 /// into the same directory, but that directory is neither the current
55 /// directory, nor in the PATH. If the executable cannot be found, return an
56 /// empty string. Return the input string if given a full path to an executable.
58 #undef FindExecutable // needed on windows :(
59 sys::Path llvm::FindExecutable(const std::string &ExeName,
60 const std::string &ProgramPath) {
61 // First check if the given name is already a valid path to an executable.
62 sys::Path Result(ExeName);
63 Result.makeAbsolute();
64 if (Result.canExecute())
67 // Otherwise check the directory that the calling program is in. We can do
68 // this if ProgramPath contains at least one / character, indicating that it
69 // is a relative path to the executable itself.
71 Result.eraseComponent();
72 if (!Result.isEmpty()) {
73 Result.appendComponent(ExeName);
74 if (Result.canExecute())
78 return sys::Program::FindProgramByName(ExeName);